Process of electric welding



(No Model.)

0. L. GOFPIN.

PROCESS OF ELECTRIC WELDING. No. 399,019. Patented Mar. 5, 1889.

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UNITED STATES PATENT OEEIcE.

CHARLES II. COFFIN, OF DETROIT, MICHIGAN.

PROCESS OF ELECTRIC WELDING.

SPECIFICATION forming part of Letters Patent No. 399,019, dated March 5, 1889.

Application filed geptemher 18, 1888. Serial No. 285,740. (No speeimcnsd To all whom it may concern.-

ductor, U, and thence olt' to the other pole of Be it known that I, CHARLES L. COFFIN, of the generator through the wire Y.

Detroit, in the county of IVayne and State of Michigan, have invented a new and useful Improvement in the Process of Electric Welding, of which the following is a specification. l My invention consists in the process of elecand C C represent two carbons or other conductors, between which the yoltaie are which does the welding is sprung.

B B represent two conductors, which are in electrical contact with the articles A A, respectively, and the current from the generator of electricity is applied as follows: From one pole of the generator the current flows through the wire \V and conductor B into the article A, thence into the article A, traversing the joint to be welded, and out through the conductor 13. Thence it passes through the carbon or conductor 0, forms the Voltaic are at the lower end of this conductor, passes forward through the other carbon or con- If desired, two generators maybe connected, one wit-h the conductors B B and the other with the carbons C O, the essence of my inven tion consisting in simultaneously traversing the joint to be welded by an electric currentand subjecting it to the action of a yoltaic arc.

Of course the articles A and A must be insulated in practicing this process.

The arrows indicate the course of the current or currents.

Vhat I claim as my invention, and desire to secure by Letters Patent, is

The process herein described of welding two' articles together, which consists in placing the two articles against each other and welding the joint by simultaneously traversing such joint by an electric current and sub- 'ec'in i 0 ie zc'ion o' a yo ic rrc, ljt llilll l llll sul 

